Employee and Employer Contributions
In most cases, the account owner (the “participant”) has made employee contributions to the 401(k) either through paycheck deductions or voluntary deferrals. These contributions belong entirely to the participant and are generally divided based on marital coverture (i.e., the portion accrued during the marriage).
Employer contributions, on the other hand, may be subject to a vesting schedule. If a portion of the employer match is unvested, that portion may not be available for division unless and until it vests. Some employers allow you to reference future vesting in the QDRO, but this must be clearly stated.

